#11339: Illegal use of __deallocate__ in cython (pyx) code
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Reporter: gagern | Owner: drkirkby
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.7.1
Component: porting | Keywords: sd31
Work_issues: | Upstream: N/A
Reviewer: François Bissey, Steven Trogdon | Author: Volker Braun,
Martin von Gagern
Merged: | Dependencies:
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Comment(by fbissey):
Replying to [comment:16 vbraun]:
> In the case at hand we don't really need the Cython class
`GroebnerStrategy._parent`, only the C struct
`GroebnerStrategy._parent._ring` is used in `__deallocate__()`. I've made
a minimal patch that adds a `cdef ring *_parent_ring` data member to
`GroebnerStrategy` to keep track of the ring only. Because it refers to a
C struct, it is safe to access it the Cython destructor. Because parents
are immutable we don't have to worry about the `ring *` pointer becoming
invalid.
>
> The patch should fix the crash, but I don't have a Sage-on-Python-2.7
install to test it. Can somebody give it a try?
Does it depend on other patches that are post 4.7.1.alpha2? The feedback
so far is that it doesn't work but I noticed there was some work in
singular and rings in alpha3 and alpha4. Would it rely on any of these
fixes?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11339#comment:19>
Sage <http://www.sagemath.org>
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